Do you affirm this quote on Biblical Theology from "They Archer and Arrow" by Phillip Jensen and Paul Grimmond (p.79)?:
Biblical Theology will help pastors be better preachers.
The way we are using the term, 'biblical theology' means basically two things. First, it is the acknowledgement that the Bible unfolds us as progressive revelation. When God spoke to Abraham, the fullness of his character and the details of his plans for creation were not known in the way that they were subsequently revealed through the apostles. For this reason Biblical reading always involves remembering where we are up to in God's unfolding plan for his world. The way that we make sense of Deuteronomy and apply it to God's people will be different from the way we read Philippians and seek to live it out today.
The second and much more significant insight of biblical theology is that all of the promises of God find their yes and amen in Christ (2 Corinthians 1:20). ... If the central message of the bible is the plan of god to reconcile the whole world under Christ, then we cannot ultimately preach any part of that word without reference to God's eternal plan fulfilled in him. Good preaching is gospel preaching from both the Old and New Testaments.